Calibrating a System with One Detector per CD800/832 Control Unit or Individual Detector of
CD802/832 Two-channel Control Unit (continued)
J-W Gas Calibration Kit (0023-7260) or Bacharach Professional Calibration Kit (51-7070;
Sample cup (#347-095 for detectors 800-086, 0023-7317, 0023-4014, and 0023-4017; or #0023-
4098 for detectors 0023-4012)
Gas Calibration Cylinder (either 100-percent nitrogen, #0023-4003, or Zero-gas/dry-air, #0023-
4004) or Professional Calibration Kit 51-7070 operating in clean-air mode if combustible-gas-
free air does not exist at the detector
Gas Calibration Cylinder containing sample gas equivalent to gas expected at detector location if
Calibration Kit 0023-7260 is used, or Professional Calibration Kit 51-7070 with self-contained
sample gas cylinder
Perform sampling and adjustment procedures for calibration as follows:
NOTE: CD800/830 and CD802/832 systems will not operate properly unless the remote detector
voltage is first set. Voltage setting should be checked and readjusted, if necessary, each time a
detector element is replaced. (Refer to Section 2-6. 7 for specific instructions for voltage
If necessary, turn meter mechanical screw adjustment to set indicator needle to zero on meter scale
(this adjustment with power off).
Turn power on at control unit and operate detector for at least five minutes before calibrating.
Using a portable combustible gas indicator, test air at detector. If air is free of combustible gases, go
on to step 4. If air is not free of combustible gases, or if portable test instrument is not available,
apply J-W Zero Gas Dry Air, J-W 100-percent nitrogen gas, or clean air from Bacharach
Professional Calibration Kit 51-7070 (per kit instructions 51-9001) as follows:
a. If using J-W Gas Calibration Kit 0023-7260 together with appropriate sample cup and gas
calibration cylinder (0023-4003 100% Nitrogen or 0023-4004 Zero Gas/Dry Air), attach
regulator assembly kit to gas cylinder. Close regulator valve and attach hose and sample cup
to regulator (Figure 3-1). If using Professional Calibration Kit 51-7070, follow kit instructions
to apply clean air output of kit to detector.
b. Place sample cup over detector (Figure 3-1).
c. If using Zero Gas/Dry Air or 100% Nitrogen cylinder, open regulator valve to fill cup with
sample gas and displace air.
Turn adjustment screw of ZERO potentiometer on control unit printed circuit board (CD800/830:
R24; CD802/832: Channel 1: R9, labeled 21; Channel 2: R13, labeled 22) as necessary to set meter
indicating needle a zero reading on meter scale.